1. principle of optical fiber fusion: the preparation of optical fiber end face includes peeling, cleaning and cutting. Qualified optical fiber end face is a necessary condition for welding, and the quality of end face affects the welding quality.

As shown in the figure:

2, optical fiber welding method:

1) Observe whether the coating on the stripped part of the optical fiber is completely stripped. If there is any residue, it should be stripped again. If there is a very small amount of coating that is not easy to peel off, a cotton ball can be dipped in an appropriate amount of alcohol and gradually erased while dipping.

2) Tear the cotton into small fan-shaped pieces, smooth each layer, dip it in a little alcohol (it is advisable to hold it with two fingers so as not to overflow), fold it into a V "shape, clamp the stripped optical fiber, and wipe it along the axial direction of the optical fiber for a success. A piece of cotton should be replaced in time after being used for 2-3 times. Using different parts and layers of cotton every time can not only improve the utilization rate of cotton, but also prevent the secondary pollution of fiber testing.

3) cutting bare optical fiber

Cutting is the most critical part in the preparation of optical fiber end face. Precise and excellent cutting tools are the foundation, and strict and scientific operation specifications are the guarantee. So as to complete effective cutting.